Yes, you still need a work permit for every job unless you have a Karta Pobytu issued on the basis of being a family member of an EU citizen. Nothing has changed and nothing will in this respect.

You can come over on the visitor visa of course, and if they apply for the work permit straight away, you can legalise yourself within the 90 day period without a problem.

But just like last time - if you get caught working without a work permit, you'll be in deep trouble, especially as it will be your second offence. Being caught a second time will almost certainly carry a long-term ban from the Schengen zone.